Art of manufacturing shoe stiffeners



Jan. 4, 1927.

J. J. DALY ART OF MANUFACTURING SHOE STIFFENERS Filed April 12, 1926 Dazeiztor' Jokndiflaly Patented Jan. 4, 192?.

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JOHN J. DALY, OF WEST NEVVTUN, MASSACHUSETTS.

ARI OF MANUFACTURING SHOE STIFFENERS.

Application filed April 12, 1926.

In the production of be); toe blanks for use in shoes, the usual procedure is to sheet out the box toe material and to then sever the sheet longitudinally into strips of the desired width, after which the individual blanks are dinked out of the strips. Before the blanks themselves, however, are inserted in the shoes, it is necessary to scarf them on one side adjacent their front and rear edge and as hertofore practiced these scariing cuts have been made independently of and subsequently to the severing cuts which severed the strips from the sheet.

According to my present invention. 1 make the strip severing cuts perform the additional function of scarfing one face of the strip adjacent either edge thereof, so that when the box toe blanks are dinked out each blank Will be properly scarfed along its front and rear edges. This avoids the necessity of performing any additional scar-ling operation upon the blank and results in a considerable saving of time and labor.

With such a material as box toe stock, however, it is difficult to obtain a clean severing cut, on account of the thermoplastic binder with which the stock is impregnated. It has been the practice heretofore to flow a soap solution on the cutting knife, but this has not been wholly satisfactory on account of the tendency of the solution to work its way into the bearings of the cutting machine.

Another feature of my present invention, therefore, consists in securing a clean severing out while avoiding the objections to present practice. I have found that this may be done by using a hot knife or blade to make the severing cut, the knife beiug heated in any convenient manner as by electricity or gas flame.

The manner of practice of my invention is disclosed in the accompanying speciiica tion and drawings, and the characteristic features of novelty are particularly pointed out in the appended claims. In the draw-- ings:

Fig. 1 is a perspective view of a sheet of box toe material and indicating thereon the longitudinal lines of severance whereby the Serial No. 101,348.

sheet is cut up into individual strips of the proper width.

Fig. 2 is a similar view of one of such strips and indicating in dotted lines the dinking out of the individual box toe blanks from such strip.

gig. 3 is'a plan view of a box toe blank, an

Fig. 4 is a section on the line 44-., of Fig. 3.

in the preferred manner of practicing my invention, the sheet 1 of box toe material is severed longitudinally into strips 2. The knives which sever the sheet into strips are disposed diagonally with reference to each other so that the lines of cut are at an angle to the plane of the sheet, producing at each edge of the strip a bevel or scarfing cut 3. This avoids the necessity for subsequently scarfing the individual box toe blanks 4 after such blanks have been dinked out of the strips, as indicated in dotted lines in Fig. 2, and results in a. material saving in time and labor. Preferably, the knives employed are hot knives so that the severing cut shall be a clean cut. This may be accomplished in any convenient manner, as by heating the knives by means of electricity or gas flame.

As an alternative method of severing the strips from the sheet, only one knife need be used and the sheet passed over said knife to cut one edge thereof, after which the sheet itself may be turned over and its opposite face pressed to the knife so as to slash the opposite edge thereof. Under either method of cutting, the scarfings are located on the same side of the strip but on opposite edges so that the scarfings 3 are both on the same side of the box toe blank adjacent the front and rear edges thereof.

While not particularly limited to the production of box toe blanks, my invention finds a field of immediate utility in such art. It is to be understood, however, that the principles apply in the cutting of various other materials, such roofing materials. linoleum, .shoe stiffener-s and counters, and that the discussion herein is merely illustrative and in no way limiting.

What I therefore claim and desire to se cure by Letters Patent is:

That improvement in the art of manufacturing shoe stiffeners, which consists in longitudinally slitting a sheet of stiffening material along spaced lines by angular outs whereby one face of each strip severed from the sheet is beveled from end to end thereof along both marginal edges, and in stamping each strip transversely across its beveled edges whereby to die out therefrom a plurality of stiffener blanks each scarfed front and rear edges constituted by portions of the beveling cuts which were made in severing the strip from the sheet.

In testimony whereof I aflix my signature.

JOHN J'. DALY.

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